Backstreet Boys Singer Howie Dorough Expecting Baby No. 2

Us Weekly -- Howie Dorough had an extra reason to celebrate his 39th birthday!

On Aug. 20, the Backstreet Boys singer announced via Twitter that his wife, Leigh, is pregnant with their second son. "Thanks to family, friends and fans for all the amazing birthday wishes," Dorough wrote. "This year I'm receiving the best gift from my wife: another baby boy!"

The couple, who wed in December 2007, are already parents to a son, James Hoke, 3.

Dorough isn't the only Backstreet Boys member with a family to feed: Richardson is father to son Mason, 5, and Littrell is father to son Baylee, 10. McLean is currently expecting his first child, a baby girl, with his wife, Rochelle Karidis.

The Backstreet Boys are currently working on their eighth studio album, slated for a spring 2013 release.